We are working on a general filter for all kinds of Tasks which will be used in version 5 of VisualCron. Currently we are looking at the below values - please tell us if you need anything more or can think of anything more that would be interesting.
# file name filter
* File name inclusion mask - "*?" etc or RegEx
* File name exclusion mask - "*?" etc or RegEx
* Case sensitivity
# file content match
File content in text files - "?*" or RegEx match
# date modified or created filter ( do you need AND? )
* NewerThanDate x - specified date or variable
* OlderThanDate x - specified date or variable
# file size
* larger or smaller than x size
# file attributes
* including a list of attributes
* excluding a list of attributes